Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike Domain in TLS SNI (stackpatc-technologies .digital)"; flow:established,to_server; tls.sni; content:"stackpatc-technologies.digital"; bsize:30; fast_pattern; reference:url,www.cert.ssi.gouv.fr/cti/CERTFR-2021-CTI-009; classtype:domain-c2; sid:2034357; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_08, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)